feat: improve assistant background controls

apps/nextjs/src/components/assistant/assistant-send.ts

@@ -0,0 +1,13 @@
+type AssistantComposerActions = {
+  setText: (text: string) => void;
+  send: () => void;
+};
+
+export const sendAssistantPrompt = (composer: AssistantComposerActions, prompt: string) => {
+  const text = prompt.trim();
+  if (text.length === 0) return false;
+
+  composer.setText(text);
+  composer.send();
+  return true;
+};